Thermal resistor S104M-PT100 produced by the original factory

The electrodes of armored thermocouples are composed of two different conductor materials.When measuring the endWhen there is a temperature difference with the reference end，Will generate thermoelectric potential，The work instrument will displayThe temperature value corresponding to thermoelectric potential.

R-type thermocouple: Platinum rhodium 13 platinum thermocouple, temperature range 0~1600 ℃. Advantages: heat resistance, good stability, and high accuracy; Can be used as a standard. Disadvantages: Low thermoelectric potential value of 15; In environments with volatile gases (especially hydrogen and metal vapors), it is relatively fragile; expensive. ※ B-type thermocouple: Platinum rhodium 30-Platinum rhodium 6 thermocouple, temperature range 600-1700 ℃. Advantages: Suitable for temperatures above 1000 ℃ to 1700 ℃; Good oxidation resistance; Heat resistance and mechanical strength are superior to R-type. Disadvantages: The thermoelectric potential is extremely small in the medium and low temperature range, and the temperature measurement below 600 ℃ is inaccurate; The thermoelectric potential value is small; expensive. K-type thermocouple: Nickel chromium nickel silicon thermocouple, temperature range -40~1200 ℃. The characteristic of K-scale is strong antioxidant performance, suitable for continuous use in oxidizing and inert atmospheres, with a long-term use temperature of 1000: C and a short-term use temperature of 1200: C. It is widely used in all thermocouples; Disadvantage: Not suitable for reducing gaseous environments, especially carbon monoxide and carbon dioxide

Gases such as sulfur dioxide and hydrogen sulfide;